mqtt plc

public void Data_write_value (int[] m_write_data){int lsize = 2;string[] Addressarray = new string[18] {"D720", "D721", "D722", "D723", "D724", "D725", "D726", "D727", "D728", "D729", "D730", "D731", "D732", "D733", "D734", "D735", "D736", "D737"};for (int k = 0; k { nbsp; int returnvalue; Lock (Lockobj) { returnvalue = _actutltype.writedeviceblock (Addressarray[k], lsize, m_write_data[k]); } if (returnvalue! = 0)//returns 0, the write succeeds.{throw new Exception ("PC left Wri

PLC Ladder diagram Programming exerciseTraffic light ControlIn a scenario like this, when the SW1 switch is turned on, the traffic light controller starts to work and the controller stops working when the SW1 is turned off.SW2 for control mode selector switch:When the SW2 is turned off, the green, yellow, and red lights turn on, the specific timing is: green light 100 seconds, flash 5 seconds (every second light off once), yellow light 5 seconds, red

Practice a traffic light controlrequirements : In the scenario where the SW1 switch is turned on, the traffic light controller starts to work and the controller stops working when the SW1 is turned off.SW2 for control mode selector switch:When the SW2 is turned off, the green, yellow, and red lights turn on, the specific timing is: green light 100 seconds, flash 5 seconds (every second light off once), yellow light 5 seconds, red light on 100 seconds.When the SW2 is turned on, the intersection b

The s7-300/400 counter typically accounts for two bytes and is 16 bits. The CPU can use a maximum of 64~512 counters with the counter address number c0~c5111.s_cud (plus and minus counter)Add and subtract counter waveform diagram:2.S_CU (plus counter)3.S_CD (minus counter)4. Three kinds of counters corresponding to the coil representation1) Basic Coil instruction2) Implementation of the plus count instruction3) Reduce the count of instructions to achieve:4) The addition and subtraction of the Co

changes, its pulse period changes.Speed Calculation formula: Speed = #60000/TThe cause of the error: Time measurement accuracy, non-floating-point division omit the number after the decimal point.Here are the programs:' InitializeLdnot W2.00MOV (021) 0 D0MOV (021) #0 D10MOV (021) #0 D2' The duration of a pulse is measured by the duration of the pulse, which is removed by #60000 (1min), which calculates how many pulses a minute has, that is, its speed.LD W2.00Out TR0@AND 0.00SET 2.00@++ (590) D0

1. Conversion instructionsThe conversion instruction is a data type conversion of the data in the accumulator 1, and the conversion result is still placed in the accumulator 1. It can realize the conversion of BCD Code and Integer, Integer and Long Integer, long integer and real, integer inverse code, integer complement, real negation and other data types.1) BCD code with integer and other types of conversion instructionsDirectives in the form of A.stlB.lad and FBD Form2. Code-type transformatio

One: Out/out_t/out_c/out_c-c32Description: Simple Shun control instructions do not do other instructions.Control requirements : NoneProgramming Ladder diagram:Structured Programming St Language:(*out (en,d); *)Out (m9,m408);(* Substituting statement m408:=m9;*)M409:=not M10; (* Substituting statement out (not m10,m409) *)Out (m11,m411);M412:=M11;Out (m12,d0.0);(*out_t (en,tcoil,tvalue) *)out_t (m13,tc1,100);Out (ts1,m413);(*out_c (En,ccoil,cvalue); *)Out_c (M14,CC10,K10);Out (cs10,m414);RST (M15

MQTT is a subscription/publish-based IoT protocol.The Python test requires a sending and receiving process, a sending client and a receiving client, and if the two clients are working under the same topic, then the message can be exchanged.Server with "iot.eclipse.org" is good, to avoid building a server, and then the process can also run through.Send client code:Import paho.mqtt.client as Mqttimport paho.mqtt.publish as Publishidx = 0#往paho/temperatu

system program, checks the status of power, memory, I/O, and alert timers, and can diagnose grammatical errors in the user program. When the programmable logic controller is put into operation, first it receives the status and data of each input device in the field by scanning, and then stores the I/O image area Separately, then reads the user program from the user program memory, and then executes the result of the logic or arithmetic operation according to the instruction after the command is

1. Traffic light Control:requirements : In the scenario where the SW1 switch is turned on, the traffic light controller starts to work and the controller stops working when the SW1 is turned off.SW2 for control mode selector switch:When the SW2 is turned off, the green, yellow, and red lights turn on, the specific timing is: green light 100 seconds, flash 5 seconds (every second light off once), yellow light 5 seconds, red light on 100 seconds.When the SW2 is turned on, the intersection becomes

1. Explanation of the procedureA. Simple method:Drva D1000 D1100 Y0 Y4　　　Drva This is the absolute position Control command, D1000 is absolute position designation, D1100 is the pulse output frequency, Y0 pulse output address, Y4 is the direction output, it has two states on and off, if the D1000 is negative, Y4 is off, then if the load is a positive turn, If the D1000 is positive Y4 is on, the load is reversedTwo, detailed Http://wenku.baidu.com/link?url=2VuqALnRp90y_C8Hh44NGdFu7d0L5JPnZ6iUGx

) format into the accumulator 1, or the specified counter's current count value in the BCD code (0~999) format into the accumulator 1. Instruction format: LCLC T3 //The current time and time base of Timer 3 is loaded into the accumulator 1 Low character LC C10 //The counter C10 count value is loaded into the accumulator 1 low word in BCD code format8.MOVE instructionThis instruction is a function box in the form of a transfer instruction, the ability to copy byte, Word or double-word data

With parameter FC, when editing the function, define the formal parameter in the local variable declaration table, and use the virtual symbolic address in the function (FC) to complete the program writing.Here's a simple example of how to write a parameter FC function.This example completes the programming of a mathematical formula: Y = (X + 5) * 11/5;The procedure is as follows:The FC mathematical formula is written as follows (internally defined input parameter variables: x and output paramete

duplex data type, or a parameter type that is specifically used for parameter passing, such as a timer, a counter, an address or a pointer to a block, and so on.3. How to use variables1) Use the variable name, preceded by the prefix "#", to distinguish it from the symbolic address in the symbol table. In incremental mode, the prefix is automatically generated.2) directly use the address of the local variable, which is only valid for the background data block and the L stack.In addition, when ca

Why is PLC so reliable?This is not a simple question. You should answer clearly not one or two articles. Here, I have been a chief engineer of stiplc for many years.Exchange experience with friends:1. What content does reliability include?Reliability means that the product can accurately complete all the designed functions under the specified conditions. Electronic products generally include:(1) Mechanical Properties(2) Electrical Performance(3) Therm

Float examples and plc programming examplesFloat instance description Float is a powerful attribute. In the actual front-end development process, people often use it for layout. However, sometimes, it is difficult to use it. For example, now we want to implement a two-column layout, with the left column fixed in width, and the right column automatically expanded in width. See: Idea: Use div + float, div1 as the column on the left, div2 as the column

In a task configuration, create a new task that can set the name and scan period?Right click on the Task,append program call and find the PRG written in the main application.?Run no problem, SUB1 collect the data of the Y variable of main once every second??For more instructional videos and downloads, please pay attention to the following information:My Youku Space:Http://i.youku.com/acetaohai123?My online forum:http://csrobot.gz01.bdysite.com/?Problem Exchange:qq:910358960Email:[email protected

: Motor:structSpeed:intCurrent:realEnd_structC. StringString strings are a one-dimensional array of up to 254 characters (CHAR), with a maximum length of 256 bytes (the first 2 bytes are information that stores the length of the string). such as ' I ' M is string 'D. Date and timeThe date and time (Date_and_time) is used to store the year, month, day, hour, minute, second, millisecond, and week, accounting for 8 bytes, saved in BCD format. Week 1~7 represents Monday to Sundaysuch as: dt#2014-09-

aggregatorChannel.pipeline (). Addafter (Pipelines.http_server_codec, Pipelines.http_object_aggregator,NewHttpobjectaggregator (max_content_length));//Join WebsocketserverprotocolhandlerString Path = This. Listener.getpath (); String subprotocols = Getsubprotocols ();BooleanAllowExtensions = This. Listener.getallowextensions (); Channel.pipeline (). Addafter (Pipelines.http_object_aggregator, Pipelines.websocket_server_protocol_handler,NewWebsocketserverprotocolhandler (Path, Subprotocols, Allo

"NPM Install module –save" not worknpm install *module* --saveDidn't generate a Package.json file?Need to be used after project directory initialization npm initIf you have already installed some module, you can use thenpm install --save Mosca Mqtt.jsMqtt.js using the WebSocket protocol Server Https://github.com/mcollina/mosca/wiki/MQTT-over-Websockets Client Https://github.com/mqttjs/MQTT.js#browserifyhttps://github.com/mqttjs/MQTT.j